'use strict'
// Template version: 1.3.1
// see http://vuejs-templates.github.io/webpack for documentation.

const path = require('path')

module.exports = {
  dev: {

    // Paths
    assetsSubDirectory: 'static', //存放静态资源的目录
    assetsPublicPath: '/', //此路径下的打包文件可在浏览器中访问。
    proxyTable: {}, //代理表

    // Various Dev Server settings
    host: 'localhost', // can be overwritten by process.env.HOST
    port: 8080, // can be overwritten by process.env.PORT, if port is in use, a free one will be determined
    autoOpenBrowser: false, //是否自动打开浏览器
    errorOverlay: true, //发生错误或者警告时是否启用信息全屏覆盖
    notifyOnErrors: true, //是否在发生错误时提示
    poll: false, // https://webpack.js.org/configuration/dev-server/#devserver-watchoptions- 是否启用轮询

    
    /**
     * Source Maps
     */

    // https://webpack.js.org/configuration/devtool/#development
    devtool: 'cheap-module-eval-source-map', //开发工具模式

    // If you have problems debugging vue-files in devtools,
    // set this to false - it *may* help
    // https://vue-loader.vuejs.org/en/options.html#cachebusting
    cacheBusting: true, //破坏缓存 强制浏览器下载新文件的一种方法

    cssSourceMap: true //是否对样式开启资源映射
  },

  build: {
    // Template for index.html
    index: path.resolve(__dirname, '../dist/index.html'), //index.html路径

    // Paths
    assetsRoot: path.resolve(__dirname, '../dist'), //输出路径../dist
    assetsSubDirectory: 'static', //存放静态资源的目录
    assetsPublicPath: './',

    /**
     * Source Maps
     */

    productionSourceMap: true, //是否对样式开启资源映射
    // https://webpack.js.org/configuration/devtool/#production
    devtool: '#source-map', //开发工具模式

    // Gzip off by default as many popular static hosts such as
    // Surge or Netlify already gzip all static assets for you.
    // Before setting to `true`, make sure to:
    // npm install --save-dev compression-webpack-plugin
    productionGzip: false, //是否开启 gzip 压缩
    productionGzipExtensions: ['js', 'css'], //gzip 压缩的扩展名

    // Run the build command with an extra argument to
    // View the bundle analyzer report after build finishes:
    // `npm run build --report`
    // Set to `true` or `false` to always turn it on or off
    bundleAnalyzerReport: process.env.npm_config_report //是否生成代码分析报告
  }
}
